#ifndef _LIVOX_GEN1_PCLOUD_AMBIENCE_QUALE_IFACE_API_H
#define _LIVOX_GEN1_PCLOUD_AMBIENCE_QUALE_IFACE_API_H

#include <cstdint>
#include <memory>
#include <optional>
#include <stdexcept>
#include <string>
#include <user/deviceAttachmentSpec.h>
#include <vector>

namespace smo {
namespace stim_buff {

inline std::string parseRequiredFromStimbuffQualeIfaceName(
	const std::vector<std::pair<std::string, std::string>>& params)
{
	for (auto it = params.rbegin(); it != params.rend(); ++it)
	{
		if (it->first != "from-stimbuff")
			{ continue; }

		if (it->second.empty())
		{
			throw std::runtime_error(
				"'from-stimbuff' must name a non-empty sensory qualeIfaceApi");
		}

		return it->second;
	}

	throw std::runtime_error(
		"internal: 'from-stimbuff' missing after intrin policy validation");
}

enum ParamComparatorOp
{
	OP_CMP_GT,
	OP_CMP_LT,
};

struct ParamComparator
{
	ParamComparatorOp op;
	uint32_t value;

	bool operator()(float passbandMetricVal) const
	{
		switch (op)
		{
			case OP_CMP_GT:
				return passbandMetricVal > static_cast<float>(value);
			case OP_CMP_LT:
				return passbandMetricVal < static_cast<float>(value);
		}

		throw std::runtime_error("Unsupported ParamComparatorOp");
	}
};

inline std::optional<ParamComparator> parseOptionalPcloudAmbienceParamComparator(
	const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec)
{
	const auto& params = deviceAttachmentSpec->qualeIfaceApiParams;
	constexpr int kParamNotSpecified = -1;
	const int gtVal = device::DeviceAttachmentSpec::parseOptionalParamAsInt(
		params, "passband-count-gt-val", kParamNotSpecified);
	const int ltVal = device::DeviceAttachmentSpec::parseOptionalParamAsInt(
		params, "passband-count-lt-val", kParamNotSpecified);

	if (gtVal != kParamNotSpecified && ltVal != kParamNotSpecified)
	{
		throw std::runtime_error(
			"Only one of 'passband-count-gt-val' or 'passband-count-lt-val' "
			"may be specified for a PcloudAmbience intrinsic pipeline");
	}

	if (gtVal != kParamNotSpecified)
	{
		return std::optional<ParamComparator>(ParamComparator{
			.op = OP_CMP_GT,
			.value = static_cast<uint32_t>(gtVal),
		});
	}

	if (ltVal != kParamNotSpecified)
	{
		return std::optional<ParamComparator>(ParamComparator{
			.op = OP_CMP_LT,
			.value = static_cast<uint32_t>(ltVal),
		});
	}

	return std::nullopt;
}

} // namespace stim_buff
} // namespace smo

#endif // _LIVOX_GEN1_PCLOUD_AMBIENCE_QUALE_IFACE_API_H